Katie Ledecky won the 400-meter freestyle Saturday at the TYR Pro Swim Series with the world’s fastest time this year.

She touched in 3 minutes, 59.25 seconds in the outdoor pool. The defending Olympic champion is the only swimmer to go under 4 minutes this year.

Leah Smith finished second in 4:06.37.

Katie Ledecky competes in the women's 400-meter freestyle final at the TYR Pro Swim Series swim meet Saturday, April 10, 2021, in Mission Viejo, Calif. Ledecky finished first. (AP PhotoAshley Landis)

Katie Ledecky competes in the women's 400-meter freestyle final at the TYR Pro Swim Series swim meet Saturday, April 10, 2021, in Mission Viejo, Calif. Ledecky finished first. (AP PhotoAshley Landis)

Ledecky added the 400 free title to the 200 free she won a day earlier, also with the fastest time in the world this year.

Brazil’s Bruno Fratus edged Caeleb Dressel to win the 50 free. Fratus touched in 21.80 seconds, with Dressel finishing in 21.83.

Caeleb Dressel looks at the results after competing in the men's 50-meter freestyle final at the TYR Pro Swim Series swim meet Saturday, April 10, 2021, in Mission Viejo, Calif. Dressel finished second. (AP PhotoAshley Landis)

Caeleb Dressel looks at the results after competing in the men's 50-meter freestyle final at the TYR Pro Swim Series swim meet Saturday, April 10, 2021, in Mission Viejo, Calif. Dressel finished second. (AP PhotoAshley Landis)